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Inheritance Jeopardy
Categories: Five.
Daily Doubles: Three.
Monohybrid
Definitions
Cross
Dihybrid
Cross
Codominance,
Incomplete
Dominance
Pedigrees,
Sex-Linkage
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“GgHH” is an example of a
_____, while “albino with
hitchhiker’s thumb” is an
example of a _____.
What are genotype, phenotype?
The region of a chromosome that
codes for one protein is called a
_____. A particular version of it is
called an _____ and is usually
represented by one or more letters.
What are gene, allele?
With respect to the gene for antler
length in moose (letter G), suppose
that the dominant phenotype is long
antlers, and the recessive phenotype
is short stunted antlers.
With respect to the gene for coat
pattern (letter P), the recessive
phenotype is a white chest spot, and
the dominant phenotype is no spot.
A moose with the genotype Ggpp
will have this phenotype.
What is: long antlers and no
white chest spot?
A parent with the genotype AB is
said to be _______.
What is heterozygous?
DAILY DOUBLE!
Choose up to your current point total
to wager.
Win = plus wager x 2
Lose = subtract wager
Match Law with Illustrative Example:
A. Law of Dominance
B. Law of Segregation
C. Law of Independent Assortment
1. Because the genes for chin dimples and
hitchhiker’s thumb are on different chromosomes,
these traits are not inherited together.
2. A parent with the genotype YY will only produce
children with a dominant phenotype.
3. A parent with the genotype UuTt produces
gametes with only one U/u allele and only one T/t
allele.
What is A-2, B-3, C-1?
One cat carries heterozygous,
long-haired traits (Ss), and its
mate carries homozygous shorthaired traits (ss). This is the
probability of an offspring with
short hair.
What is 50%?
One flower is heterozygous red
(Rr) and it is crossed with a
homozygous white (rr) plant.
This is the probability of redcolored offspring.
What is 50%?
In dogs, there is an hereditary deafness caused
by a recessive gene, “d.” A kennel owner has a
male dog that she wants to use for breeding
purposes if possible. The dog can hear, so he
must be either DD or Dd. If the dog’s genotype
is Dd, the owner doesn’t to use him as a longterm breeder. To find out, she breeds him with a
deaf female (dd). They have 10 puppies.
If the male was heterozygous, this many puppies
will be deaf. If he was homozygous, this many
puppies will be deaf.
Heterozygous: 5.
Homozygous: 0.
Two plants with a dominant
phenotype are crossed. 25% of
their offspring have a recessive
phenotype.
Therefore, these must have been
their genotypes. (Homozygous
dominant, homozygous recessive,
or heterozygous)
What are heterozygous and
heterozygous?
This is a cross showing a heterozygous
male mated with a homozygous female.
A (1) a
a Aa (3) aa
a (2) Aa
aa
The numbered boxes 1, 2, and 3
represent these three real-world cells
respectively.
What are a possible sperm, egg, and
zygote?
What is the probability that the
offspring of a cross of iikk x iiKK
would have a dominant phenotype
for both genes?
What is 0%?
What is the probability that a cross
of JJuu x jjUU would be
heterozygous for both genes (JjUu)?
What is 100%?
A heterozygous platypus with
twisted claws and pink foot pads
mates with another platypus who is
homozygous recessive for both
traits.
What are their odds of having
twisted-clawed, pink-foot-padded
baby platypii?
What is 25%?
Two black-eyed, orange-gilled fish
are both heterozygous (BbGg).
What are their odds of having paleeyed, pink-gilled offspring?
What is 1/16, or 6.25%?
DAILY DOUBLE!
Choose up to your current point total
to wager.
Win = plus wager x 2
Lose = subtract wager
A farmer has a female goat that is
homozygous recessive for both a thin
coat and stunted hooves (tthh).
He wants offspring with thick coats and
normal hooves. He has his choice of
males that are TThh, TtHh, or TtHH.
Which male is most likely to produce
thick-coated, normal-hooved offspring,
and what chance does he have?
What is the male with the genotype
TtHH, and 50%?
A frog with striped feet mates with a
frog with spotted feet, producing
babies whose feet have both stripes
and spots. It’s an example of this
kind of inheritance pattern.
What is codominance?
Suppose koalas exhibit incomplete
dominance with respect to nostril
color, and the letter N/n is used for
the gene. If a black-nostrilled koala
mates with a white-nostrilled koala,
what will be the phenotype and
genotype of the offspring?
What are gray nostrils, and Nn?
If color is incompletely dominant,
what are the odds that a red flower
and an orange flower could have
yellow offspring?
What is 0%?
Recall that for blood type, A and B are
codominant alleles while O is recessive to
both.
In Mamma Mia, Sophie wants to know who
her father is, but she could’ve saved herself
all that trouble. She has Type B blood,
while her mother has Type A. Of her three
possible fathers, Sam was Type O, Bill was
type A, and Harry was type AB. Could any
of them be the right guy?
Yes, Harry.
Recall that for blood type, A and B
are codominant alleles while O is
recessive to both. And when it
comes to Rh factor, + is dominant to
-.
What are the odds that an AB+mother and an AO-- father would
have a child with B- blood?
What is 2/16, or 12.5%?
A woman who is XAXA has two
children with a man who is XaY.
One is a daughter and the other is a
son. What are the odds that at least
one of the children has the recessive
phenotype?
What is 0%?
Suppose a gene is carried on the Ychromosome. A woman marries a
man who has the dominant
phenotype for this gene. What are
the odds that a daughter would have
the dominant phenotype, and what
are the odds that a son would?
What are 0% and 100%?
If two blue-footed boobies with
shiny feathers have five children,
and one of them has dull feathers,
are shiny feathers the dominant or
recessive phenotype? (Making a
pedigree is recommended)
Shiny feathers are dominant.
Hemophilia is recessive and Xlinked in humans. What are the odds
that a hemophiliac father and carrier
mother would have a hemophiliac
son?
What is 1/4?
DAILY DOUBLE!
Choose up to your current point total
to wager.
Win = plus wager x 2
Lose = subtract wager
1
Complete genotypes for this pedigree, and give
probability that person 1 is heterozygous. Remember
shaded = recessive phenotype. Use the letter R/r.
Rr
Rr
Rr
rr
Rr
1
R?
50%
chance
of Rr
R?
rr
R?
Rr
Rr
Rr
rr
R?